If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
10/15 = 12/x // - 12/x
10/15-(12/x) = 0
10/15-12*x^-1 = 0
-12*x^-1 = -2/3 // : -12
x^-1 = 1/18
-1 < 0
1/(x^1) = 1/18 // * x^1
1 = 1/18*x^1 // : 1/18
18 = x^1
x = 18
x = 18
| 7(4-3*4)=-8(2*4-1) | | X/7-8=-7 | | 25500+1200x=47900 | | 9+3(z-3)=-4z+1 | | 6-(2/9v)=-14 | | (8x+5)+(3x+8)=90 | | Z+20=4 | | 4c/3-7=5 | | -5n-2=-42 | | x^2-3x+8=x^2-5x+10+2x-2 | | -8(2f+3)=4(-8+54f) | | 4(5-2v)-6v=4(-7v-5)+6v | | 14/7 | | f(d)=-2d-3 | | 4x+4x-5=27 | | -12+4e+10-7e= | | 1-m=6-6 | | -2(4-11)= | | 7x+10=-5x-86 | | -12x-19=-57 | | 36.663=p+11.363 | | d=-2d-3 | | x^2-3x+8=x^2-5x+10+2x+2 | | 4y-70=12y-3 | | y+13=98 | | 4+x/6=5 | | 1-5r=11 | | -18+o=18 | | 6+6x=4x+0 | | 6-4d=16+9d | | x^2-310x+24025=0 | | -12k+14k= |